I was initially struggline with some of the notations used in the figures specially with 2 digit ones and I think I kinda understood now and put some of the examples along with descriptions, are those correct?
x0 | data point 1, input
x1 | data point 2, input
x00 | data point 1, feature #1
x01 | data point 1, feature #2
a00 | computed score from data point #1, feature #1
a01 | computed score from data point #1, feature #2
a10 | computed score from data point #2, feature #1
a11 | computed score from data point #2, feature #2